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Help overclocking 7970

post #1 of 6
Thread Starter 
Hey guys, I recently got a Sapphire 7970 Dual-X with a blue PCB. Unfortunately, I'm having trouble getting an overclock stable. The stock core clock is 950 Mhz, and I can't even bump it to 1050 Mhz at stock voltage without it crashing after a few minutes frown.gif

I'm running 13.4 drivers and I've tried using MSI Afterburner and Sapphire TRIXX to overclock (not at the same time, of course tongue.gif) I've tried removing my driver and then reinstalling it as well.

I feel like my stock voltage is pretty low (1.112v), but I don't know what a typical stock voltage is. Any insight?

MY VRAM is at 1.5v instead of the standard 1.6v, so I can only clock VRAM to about 1550. Any more and it crashes after a bit.

What I find strange is that I almost never get artifacts when I overclock. My driver just crashes or my system just freezes instead, and this is with just bumping clocks up a few Mhz at a time.

Any recommendations on where I should approach this to get a nice, clean overclock? Perhaps I just got a poorly clocking 7970 frown.gif

Thanks a bunch!
Yuki
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Yuki
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post #2 of 6
What's your ASIC score? I don't think you can get much higher than 1 GHz on stock volts, if you want to overclock further you're going to have to up your voltage.
post #3 of 6
Thread Starter 
Quote:
Originally Posted by KaiserFrederick View Post

What's your ASIC score? I don't think you can get much higher than 1 GHz on stock volts, if you want to overclock further you're going to have to up your voltage.

ASIC quality is 64.3%

Looking around online, it seems a decent number of people hit 1100+ on stock voltage
Yuki
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Yuki
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post #4 of 6
my powercolor 7970 has a stock core voltage of 1.167v. i can oc it to 1100/1575 at that oc, i can play BF3 and run benches. ASIC is 60%.

your stock voltage seems low indeed.

edit: vram voltage is 1.6v.
Edited by rdr09 - 7/12/13 at 8:48pm
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Second Intel Rig
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post #5 of 6
Thread Starter 
Quote:
Originally Posted by rdr09 View Post

my powercolor 7970 has a stock core voltage of 1.167v. i can oc it to 1100/1575 at that oc, i can play BF3 and run benches. ASIC is 60%.

your stock voltage seems low indeed.

edit: vram voltage is 1.6v.

Thanks for the info smile.gif

I bumped my core voltage to 1.167v and I'm testing out a 1100 core clock with Heaven 4.0 right now.
Yuki
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Yuki
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post #6 of 6
Quote:
Originally Posted by chronostorm View Post

ASIC quality is 64.3%
That's not bad, mine is only around 66%, I've seen much higher but also much lower.
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